Source: User translation of the box
Backpacker 3: The Collection is an compilation pack, consisting of the original Backpacker 3 and it's two expansion packs, Backpacker 3: Mediterraneo and Backpacker 3: americana. The original game has 100 cities and more than 11000 quiz questions, the expansion packs provide 15 cities and more than 2000 new questions each.